I've been teaching people to code for 20 years. In virtually every course I've ever taught, at least one person comes up with a question that I've never heard b

I've been teaching people to code for 20 years. In virtually every course I've ever taught, at least one person comes up with a question that I've never heard before. If that person were limited to learning from a web site or a video, that's the point at which that person would get stuck. But because I can answer their question, they can continue quickly.